EM7455; how to limit GPS output to just GPRMC sentence?

My agency uses Panasonic CF-33’s (equipped with Windows 10 1909) in the field, equipped with EM7455 chips from which we gather GPS sentences. We have a need to limit the output of these chips to solely the GPRMC sentence. Anyone have any idea how to do that?

Hi @jchristensen

You can enter AT command AT!GPSNMEASENTENCE=2 and reset module (AT!RESET) to limit the output of these chips to solely the GPRMC sentence.

!GPSNMEASENTENCE Set or report the current GPS NMEA sentence types

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@Donald, I really appreciate your reply and I feel like we’re half way there. My next question, and this may be rudimentary so I apologize, is how to connect to the modem. I’ve used Putty to connect to the chips COM port but it consistently feeds the current GPS sentences through Putty and doesn’t allow me to execute commands. Can you walk me through connecting to the chip in Windows. I’d owe you beers!

EDIT: When I use something like (https://learn.sparkfun.com/tutorials/terminal-basics/command-line-windows-mac-linux) when I attempt to ReadLine() it shows me the same stuff I get from Putty, its like the EM7455 is consistently talking and won’t listen to any commands.

Hi jchristensen,

Firstly, you need install the latest driver window for EM7455 https://source.sierrawireless.com/resources/airprime/software/usb-drivers-build-4836/#sthash.k20RCx1D.dpbs

Secondly, you use Sierra Wireless Snapdragon™ X7 LTE-A WWAN Modem port for AT command and Sierra Wireless Snapdragon™ X7 LTE-A NMEA Port for output NMEA GPS sentences.

I have attached the screenshot as below for your reference.

Please help to tick “Solution” if your question is answered. So the community could easily find the solution for their problems.

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Surely you’ve heard this before, but… You are an absolute genius!!! Thank you SO much! Where do I send these beers???

I am very happy to know it is working. I like tea :slight_smile: